Let's take a look at the source of crystal lamps: As early as the mid-seventeenth century in Europe, crystal lamps existed, but they were only used by royals and nobles at that time. There is only one reason. At that time, the crystal lamps used natural crystals, and there were few resources. It was very difficult to process purely by hand. Ordinary people could not afford its high cost.
According to the definition of Baidu Encyclopedia, K9 crystal is also called K9 glass, and it also refers to glass products made of K9 material, which is a kind of optical glass. That is to say, by definition, we can see that K9 crystal is not crystal.However, K9 glass is better than many other materials in terms of light transmittance, refraction effect, and hardness, and the cost is not high, so it is favored by the lighting industry.
2. Why is K9 glass called crystal in China?
As mentioned earlier, crystal lamps, and even crystals, all originated from the upper class and royal family in Europe. From a technical point of view, the European Union's requirements for artificial crystals are firstly that the content of lead oxide is >24%, while K9 glass does not contain lead oxide, and its refractive index is much lower than that of leaded glass. Therefore, in the eyes of Europeans, K9 crystals are not even considered artificial crystals.Then why do we always claim that K9 glass is a high-grade man-made crystal in China?1. The domestic crystal market is too small to form an industry standard;
2. For artificial crystals, the country has no relevant laws and national standards, and it is impossible to clearly stipulate that K9 is not a crystal;
3. Chinese people habitually call crystal-clear things crystal, and K9 crystal is also a habitual name.
3. What is the difference between real crystal and glass
1. In terms of material: crystal is the crystallization of silicon dioxide, glass is a molten mixture containing silicon dioxide, the chemical composition is different, and the purity is also different.3. Processing and production: glass can be processed by machine hot casting process, mass production, low cost and low loss. However, because crystal is a crystal, it has the characteristics of being irreversible after hot melting, so it can only be processed by traditional methods at present, and the cost is relatively high.
4. Price: Based on the above factors, the cost of real crystal is ten or even dozens of times higher than that of optical glass. Of course, this is also the biggest and most obvious difference between the two.
So, now you should know that the crystal lamp you bought is real or fake. Even those merchants may not necessarily know whether they are selling real crystals or fake crystals. Of course, what I want to say is: whether it is optical glass or artificial crystal, as long as the cost is reasonable and the decoration and lighting effects are good, then it`s okay to try it!